The ex-Manchester United boss reportedly had dinner with the Ballon d'Or winner after Schalke's 4-3 win at the Bernabeu and tried to persuade Ronaldo to move back to the Red Devils, the Sun on Sunday reports.

The Portugal skipper was visibly frustrated with his side's performance during Tuesday night's Champions League defeat despite netting two goals for his team.

The 30-year-old was caught on video describing Madrid's display as a 'disgrace' to team-mate Karim Benzema before storming off the pitch without acknowledging the fans.

ESCAPE: Sir Alex Ferguson is attempting to convince Ronaldo to come back to Old Trafford [GETTY]

The team walked off the field to the sound of boos and Ronaldo then snubbed a post-match interview, before informing the media that he would not be talking to them again until the summer.

Ronaldo caused controversy last month after hosting a birthday party just hours after his side were defeated 4-0 to bitter rivals Atletico Madrid.

And he has come in for criticism from the club's fans for his recent performances on the pitch, with a poll in a leading newspaper revealing that 32% of Real Madrid's supporters wanted him axed from the side.

FATHER FIGURE: Ronaldo and Ferguson continue to enjoy a good relationship [GETTY]

All of this has left Ronaldo feeling unhappy in Madrid, according to reports, and he could be tempted to make the move back to Manchester in the near future.

It was rumoured earlier in the week that Louis van Gaal had opened talks with agent Jorge Mendes over a potential move for Ronaldo as he prepares a £71.1m offer for the troubled ace.